30 ONYCHOTEUTHIDiE. 



In this genus the body is sliort, the tentacular arms 

 long, outside the web, with six rows of dentated cups on 

 their ends ; the pen is short and broad. The H. Bonel- 

 liana rivals in colour the brilliancy of the butterflies of 

 tropical suns ; the large membrane which unites its arms 

 is of a rich purple, and the suckers are sapphire, the under 

 surface being" studded with blue and yellow spots on a 

 reddish ground, sprinkled with purple spots. 



Species of Ilistiotetithis. 

 Bonelliana, Ferus. Riippellii, Verany. 



Fam. ONYCHOTEUTHID^. 



Eyes naked, with a sinus above. Mantle furnished with 

 three internal cartilages, one dorsal, and two ventral, 

 Siphuncle with a valve. 



Shell solid, horny. 



The fins are posterior, dorsal, and angular ; the head is 

 moderate and cylindrical ; the eyes naked, with a deep 

 lachrymal sinus at the upper edge ; the ears have a well- 

 marked longitudinal crest ; the tentacular arms have a 

 rounded group of small sessile cups at the extremity of the 

 club ; the shell is internal, horny, lanceolate, and without 

 any air-chambers. These animals are usually termed 

 Squids, and Calamaries ; they are gregarious and frequent 

 the open seas of all climates. 



Genus ENOPLOTEUTHIS, D'Orbigny. 



Fins subterminal, dorsal, rhombic. Tentacular and ses- 

 sile arms with claw-like hooks. Sessile arms with hooks 

 only. 



